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Perfect Fluid Spacetimes and Gradient Solitons
Journal of Nonlinear Mathematical Physics, 2022 AbstractIn this article, we investigate perfect fluid spacetimes equipped with concircular vector field. At first, in a perfect fluid spacetime admitting concircular vector field, we prove that the velocity vector field annihilates the conformal curvature tensor.
Krishnendu De, Abdallah Syied
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Thermodynamical stability for a perfect fluid [PDF]
European Physical Journal C: Particles and Fields, 2017 According to the maximum entropy principle, it has been proved that the gravitational field equations could be derived by the extrema of the total entropy for a perfect fluid, which implies that thermodynamic relations contain information as regards ...
Xiongjun Fang, Xiaokai He, Jiliang Jing
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SciPost Physics, 2018 We present a systematic treatment of perfect fluids with translation and rotation symmetry, which is also applicable in the absence of any type of boost symmetry.
Jan de Boer, Jelle Hartong, Niels A. Obers, Watse Sybesma, Stefan Vandoren
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The quantum perfect fluid in 2D
SciPost PhysicsWe consider the field theory that defines a perfect incompressible 2D fluid. One distinctive property of this system is that the quadratic action for fluctuations around the ground state features neither mass nor gradient term.
Aurélien Dersy, Andrei Khmelnitsky, Riccardo Rattazzi
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Shadow Images of a Rotating Dyonic Black Hole with a Global Monopole Surrounded by Perfect Fluid
Universe, 2020 In this paper, we revisit the rotating global monopole metric and extend the metric to a rotating dyonic global monopole in the presence of a perfect fluid. We then show that the surface topology at the event horizon, related to the metric computed, is a
Sumarna Haroon +2 more
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Gravitational field of a spherical perfect fluid [PDF]
European Physical Journal C: Particles and Fields, 2019 Analyzing the spacetime for a static spherically distributed perfect fluid we show that the smooth matching of the interior and exterior metrics for a realistic source is possible only for the distances from the origin that exceeds the photon sphere ...
Merab Gogberashvili, Beka Modrekiladze
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Spacetimes Admitting Concircular Curvature Tensor in f(R) Gravity
Frontiers in Physics, 2022 The main object of this paper is to investigate spacetimes admitting concircular curvature tensor in f(R) gravity theory. At first, concircularly flat and concircularly flat perfect fluid spacetimes in fR gravity are studied.
Uday Chand De +5 more
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Gravitational collapse of perfect fluid [PDF]
Physics Letters A, 1999 The spherical gravitational collapse of a compact packet consisting of perfect fluid is studied. The spacetime outside the fluid packet is described by the out-going Vaidya radiation fluid. It is found that when the collapse has continuous self-similarity the formation of black holes always starts with zero mass, and when the collapse has no self ...
da Rocha, J. F. Villas +2 more
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Graphene: A Nearly Perfect Fluid [PDF]
Physical Review Letters, 2009 Hydrodynamics and collision-dominated transport are crucial to understand the slow dynamics of many correlated quantum liquids. The ratio eta/s of the shear viscosity eta to the entropy density s is uniquely suited to determine how strongly the excitations in a quantum fluid interact. We determine eta/s in clean undoped graphene using a quantum kinetic
Markus, Müller +2 more
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